XTI 1002 connection problem

Hello! Help! There was a following, System Architect 3.00 has suggested me to update firmware, after updating of an insertion the amplifier began to be defined as xti 4002 and after reboot my computer isn't defined by the amplifier! Unidentified usb the device. Tried on different computers - result same - unidentified usb the device. The second amplifier xti 2000 is normally defined on the computer and all perfectly works. What to do with xti 1002!?

Hello! Help! There was a following, System Architect 3.00 has suggested me to update firmware, after updating of an insertion the amplifier began to be defined as xti 4002 and after reboot my computer isn't defined by the amplifier! Unidentified usb the device. Tried on different computers - result same - unidentified usb the device. The second amplifier xti 2000 is normally defined on the computer and all perfectly works. What to do with xti 1002!?